Other mistake: At the very beginning of the film, we see Christie commit a murder at the end of the Second World War whilst wearing the uniform of a Special Constable. Christie served during the First World War, and he wears the ribbons of the 1914 or 1914/15 Star, the British War Medal and the Victory Medal on his tunic. Unfortunately, whoever put them on put the bar upside down - they read from left to right VM, BWM, Star.
10 Rillington Place (1971)
1 other mistake - chronological order
Directed by: Richard Fleischer
Starring: John Hurt, Richard Attenborough, Judy Geeson, Pat Heywood
Continuity mistake: The pint of beer seems almost full during the visit to the pub, with Tim's wife. It's suddenly half empty when he drinks it, then almost full again.
John Reginald Christie: Ere, be careful - do you mind.
Workman Willis: Mind the paintwork, mate.
Workman Jones: And the priceless anti-ques.